Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:25 AM
micromass

1 
27,684 
I hope someone can help me prove one of De Morgan's Law:
(A intersection B)' = A' U B'

Aug2711 08:43 PM
phinds

14 
129,085 
Suppose we have a directed acyclic graph. The nodes are labeled with integers (which may be negative). Imagine that...

Aug2511 12:30 AM
mXSCNT

3 
1,495 
Koosis: Statistics..., 4th ed., p. 177:
The given answer is yes. "You must be prepared to assumed the...

Aug1711 07:00 PM
Stephen Tashi

3 
2,226 
How do we formalize the following:
For all natural Nos : n^2 is even\Rightarrow n is even

Aug1911 09:48 PM
Rasalhague

5 
1,731 
Consider a probability space (\Theta, \Sigma_\Theta, P_\Theta), where P_\Theta is a probability measure on the...

Aug1911 01:43 AM
vladb

11 
2,614 
Hi everybody, I was wondering this:
"What is the probability, given all the information (including scientific...

Aug1811 09:35 PM
SteveL27

2 
1,380 
I'm not a mathematician, but I want to understand how a mathematician would view this issue.
I'm working primarily...

Aug1811 09:03 AM
bpet

1 
1,027 
I've tried to understand Johansen test, but I don't understand it.

Aug1811 10:46 AM
Tosh5457

0 
829 
Hi,
Just wanted to ask a question regarding existence and uniqueness of solutions to SDEs. Say you have shown...

Aug1811 09:50 AM
yip

0 
964 
I think that I have figured out a way to beat the game of roulette with simple probability and a very useful...

Aug2111 02:03 PM
mrspeedybob

3 
1,616 
Consider a statement
A: Negation of A (~A) is true
Then,
~A: Negation of A is false
If A is true, that...

Aug1911 08:08 AM
HallsofIvy

1 
877 
Hello everyone (first post here :)),
I have a question regarding Probability. I calculated the distribution of a...

Aug1911 07:39 PM
Stephen Tashi

6 
1,924 
I want to know what is the meaning of percentile.
what is the percentile : 23.79 means?
Please give me explanation...

Aug1911 12:26 PM
AudioFlux

1 
2,566 
When we refer to terms in an equation, what EXACTLY are we referring to? Suppose for example we have:
ab + bc + cd...

Aug2211 02:42 PM
alexfloo

4 
1,990 
Hello,
I have sample of ~280 measurements. Some are replicates and some are not. I want to remove the...

Aug2411 09:35 PM
Stephen Tashi

1 
1,650 
I need to find the formula involving \neg, \wedge or \vee for the following truth table with the variables P and Q:
...

Aug2011 07:41 PM
MisterX

1 
1,897 
Suppose you have a set of digits, for the sake of simplicity we'll make them binary, how would you determine the...

Aug2111 07:39 PM
Hurkyl

3 
2,209 
The Markov chain, as you know, is a sequence of random variables with the property that any two terms of the sequence...

Aug2111 06:50 PM
alexfloo

1 
763 
Hi everyone!
I have a question on how to compare two distributions. I'm currently a 2nd year biology grad student,...

Aug2311 12:22 AM
Stephen Tashi

12 
4,823 
Dear everyone,
consider a function f(x) of a random variable x with average m and probability distribution p(x).
...

Aug2311 02:30 PM
alexfloo

2 
1,172 
I've never been exposed to this axiom schemata of replacement before, so here's my understanding of it: the axiom...

Aug2311 03:30 PM
Hurkyl

1 
987 
I was reading this up on Wiki so I'll just give a quick overview and then ask my question.
Let \cal{S} be an...

Aug2511 11:16 PM
Kevin_Axion

2 
1,173 
Being a hobbiest programmer, I know enough about probability to get by. However, I've set myself an impossible (for...

Aug2711 06:14 AM
lyric

4 
1,329 
Hi,
For a measurement setup I'm designing, I have to position two sensors which have to be placed at an angle...

Aug2411 09:48 AM
Stephen Tashi

1 
899 
The two events A and B have probabilities 0.2 and 0.4. Also P(A intersect B) = 0.08.
(a) Are the two events A and...

Aug2611 05:00 AM
SW VandeCarr

1 
1,423 
Along 14 separate sections of highway measurements of trac volume (x) and rate of
accidents (y) were taken.
x;...

Aug2611 09:51 AM
Stephen Tashi

4 
2,245 
 Sanders: Statistics: A First Course, 5th ed., § 7.2, p. 236.
Why? The data has not been changed. What difference...

Aug2811 02:02 PM
Stephen Tashi

14 
2,583 
What is the difference between sigma algebra and topological space topological space?also what is the meaning of...

Aug2511 09:52 AM
Rasalhague

2 
2,115 
Firstly, I would like to say that I am an applied physics major, so my knowledge on probability not relating to...

Aug2511 04:35 PM
mhyuen

2 
750 
Does anyone happen to know what the cardinality of the set of ordinal number (transfinite and otherwise) is? A...

Aug2711 09:06 AM
AlephOmega

4 
1,952 
From Koosis, I pieced together the following algorithm.
Is sigma known?
Yes? Then calculate the exact confidence...

Aug2711 03:35 PM
I like Serena

1 
1,188 
Hi. I have a proof of a very basic measure theory theorem related to the definition of a measure, and would like to...

Aug2611 02:15 PM
micromass

4 
1,474 
Hello!
I need your help. I’m really terrible at statistics, probability, permutations, and combinations. I’ve looked...

Aug2711 06:21 PM
exdejesus

6 
2,024 
Hi
By some googling it seems like there exist some kind of expansion of the Taylor series for statistical...

Aug2611 03:57 PM
Stephen Tashi

1 
1,402 
I need to verify this identity:
(A\B)\DeltaC = (A\DeltaC)\Delta(A\bigcapB)
(with delta standing for the...

Aug2711 07:19 PM
autre

3 
983 
Hi everyone,
This is not a homework question. I just want to understand an aspect of linear regression better. ...

Aug2711 11:50 PM
Stephen Tashi

3 
2,307 
I am working with some wind speed data and need to work out the standard deviation of the magnitude of the horizontal...

Aug3011 03:47 PM
Stephen Tashi

5 
2,543 
Hi all
I'm having a bit of trouble trying to calculate the Upper and Lower Control Limit on R chart.
The file...

Aug2811 11:42 PM
Apple&Orange

0 
759 
So I took probability last year, and for one of my classes we have an optional refresher worksheet, but I cannot...

Aug2911 10:53 PM
I like Serena

1 
1,055 
I read about the differences between Ipv4 and Ipv6, regarding address size.
Ipv4 = address size of 32 bits
Ipv6 =...

Aug3011 05:15 AM
chiro

1 
1,363 